[tex]d) \: m - nx = 2p \\ - nx = 2p - m | \div ( - n) \\ x = - \frac{2p - m}{n} \\ e) \: \frac{x + 7}{3} = y | \times 3 \\ x + 7 = 3y \\ x = 3y - 7 \\ [/tex]
[tex]f) \: \frac{2x}{3} = \frac{5y}{6} \\ 12x = 15y \\ x = \frac{15}{12} y \\ x = 1 \frac{1}{4}y[/tex]
